JP2015065980A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article capable of raising a central region positioned at a widthwise center thereof stably to a wearer's side.SOLUTION: An absorbent article is formed with: a pair of second longitudinal compression grooves 82 individually disposed on the widthwise outer sides of a central region RC containing the widthwise center of an absorbent; and a second widthwise compression groove 86 extending widthwise. Between the second longitudinal compression grooves 82 and the widthwise end portions of the absorbent, there is disposed a low rigid area RL. On the outer sides of the longitudinal direction of the low rigid area RL, there are formed high rigid areas RH more rigid than the low rigid area. The high rigid areas are formed with compression grooves for compressing the absorber in the thickness direction, and disposed in the individual widthwise outer sides of four portions of the longitudinal outer side end portions of the second longitudinal compression grooves 82.

Description

  The present invention has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body provided between the top sheet and the back sheet, and a compressed groove that squeezes the top sheet and the absorbent body. It relates to the formed absorbent article.

  2. Description of the Related Art Conventionally, absorbent articles such as sanitary napkins are widely known in which compressed grooves are formed by pressing a liquid-permeable top sheet and an absorbent body. Also, various types of compressed grooves have been proposed.

  For example, an absorptivity having a pair of inner grooves as pressing grooves formed on both side portions of the excretion part region and a pair of outer grooves as pressing grooves formed on the outer sides in the width direction of the pair of inner grooves. Articles are disclosed (for example, see Patent Document 1). The inner and outer grooves are curved in a convex shape outward in the width direction in plan view.

  In the absorbent article of Patent Document 1, an inner groove and an outer groove are formed on the outer side in the width direction of the excretory part region, and when a compressive force is applied from the outer side in the width direction toward the center in the width direction when worn, And it is easy to be deformed starting from the outer groove. Therefore, the part in which the inner side groove | channel and the outer side groove | channel were formed moves to the width direction inner side, and the excretion part area | region pinched | interposed into the inner side groove | channel may protrude to a wearer side.

JP 2010-136972 A

  However, the above absorbent article has the following problems.

  In the absorbent article disclosed in Patent Document 1, when a compressive force is applied from the outer side in the width direction toward the inner side in the width direction, the region on the outer side in the width direction than the inner groove and the outer groove has a thickness while being compressed in the width direction. Move in the direction. The region on the outer side in the width direction than the inner groove and the outer groove is raised in the wearer side or recessed on the underwear side by moving in the thickness direction.

  At this time, when the region on the outer side in the width direction than the inner groove and the outer groove is recessed on the underwear side, the region located on the outer side in the width direction of the excretion part region is located on the underwear side relative to the excretion part region, and the excretion part is relatively The region tends to rise to the wearer side.

  However, when the region on the outer side in the width direction than the inner groove and the outer groove is raised on the wearer side, the region located on the outer side in the width direction of the excretion part region is located on the wearer side relative to the excretion part region. The excretion region is easily recessed on the underwear side.

  That is, in the absorbent article disclosed in Patent Document 1, when a compressive force is applied from the outer side in the width direction toward the inner side in the width direction, the excretory region is raised on the wearer side due to the deformation mode of the inner groove and the outer groove. Or dent on the underwear side. Therefore, the excretion part area | region could not be raised to a wearer side stably.

  Then, this invention is made | formed in view of the above-mentioned subject, and it aims at providing the absorbent article which can raise the center area | region located in the center of the width direction of an absorbent article stably to a wearer side. To do.

  The absorbent article (absorbent article 1) according to the present invention has a longitudinal direction (longitudinal direction L) and a width direction (width direction W) orthogonal to the longitudinal direction, and is a liquid-permeable topsheet (topsheet). 10), a liquid-impermeable back sheet (back sheet 20), and an absorber (absorber 30) provided between the top sheet and the back sheet, at least the top sheet and the absorption It is an absorbent article in which a compressed groove (pressed groove 80) is formed by compressing the body in the thickness direction of the absorbent article, and the compressed groove is a central region (central region RC) including the center in the width direction of the absorbent body. ) And a pair of longitudinal pressing grooves (second longitudinal pressing grooves 82) extending in the longitudinal direction of the absorbent article, and disposed outside the longitudinal pressing grooves in the longitudinal direction, and Width pressing extending in the width direction of the absorbent article (Second width squeezing groove 86), and the rigidity between the longitudinal squeezing groove and the widthwise end of the absorber is lower than the region where the longitudinal squeezing groove is formed. A rigid region (low-rigid region RL) is provided, and on the outside in the longitudinal direction of the low-rigid region, a high-rigid region (high-rigid region RH) having higher rigidity than the low-rigid region is provided. The high-rigidity region is a region where a pressing groove (high-rigidity pressing groove 88) for compressing the absorbent body in the thickness direction or a region where the basis weight of the absorbent material constituting the absorbent body is higher than the surroundings, The gist is that it is provided at each of the four lateral ends in the longitudinal direction of the longitudinal compressed groove.

  ADVANTAGE OF THE INVENTION According to this indication, the absorptive article which can be raised to the wearer side stably the central field located in the width direction center of an absorptive article can be provided.

It is the top view seen from the skin contact surface side of the absorptive article concerning an embodiment. It is a schematic cross section of the XX cross section shown in FIG. It is a schematic cross section of the YY cross section shown in FIG. FIG. 4A is a schematic cross-sectional view showing a state where the absorbent article according to the comparative example is mounted. FIG. 4B is a schematic cross-sectional view showing a state where the absorbent article according to this embodiment is mounted.

  With reference to drawings, the absorbent article 1 which concerns on embodiment is demonstrated. FIG. 1 is a plan view of the absorbent article, and FIG. 2 is a cross-sectional view taken along line XX shown in FIG. 3 is a cross-sectional view taken along line YY shown in FIG. The absorbent article 1 according to the present embodiment is, for example, a sanitary napkin.

  The absorbent article according to the embodiment is a daytime sanitary napkin. Therefore, in the absorbent article according to the present embodiment, the length of the front region R1 located on the front side of the wearer in the longitudinal direction L (longitudinal direction) and the rear region R2 located on the rear side of the wearer are approximately. The same.

  In addition, the area | region between a pair of wing parts 43 and 44 mentioned later is crotch area | region R3 arrange | positioned at a wearer's crotch. Specifically, a crotch region R3 is provided from the front root CA1 of the pair of wing portions 43, 44 to the rear root CA2 of the pair of wing portions 43, 44. The front side of the crotch region R3 is the front region R1, and the rear side of the crotch region R3 is the rear region R2. In FIG. 1, the center line in the longitudinal direction L of the absorbent article 1 is shown as the longitudinal center line LCL, and the center line in the width direction W of the absorbent article 1 is shown as the width direction center line WCL. ing. The center of the crotch region R3 is a position where the longitudinal center line LCL and the width direction center line WCL intersect.

  In addition, although crotch area | region R3 of this Embodiment is made into the area | region between the wing parts 43 and 44, it is not restricted to this structure. For example, in an absorbent article that does not have a wing portion, a region where the maximum length in the width direction of the absorbent body 30 is longer than the maximum length in the width direction of the front region R1 and the maximum length in the width direction of the rear region R2. The maximum length in the width direction of the absorber 30 may be shorter than the maximum length in the width direction of the front region R1 and the maximum length in the width direction of the rear region R2.

  The front region R1, the rear region R2, and the crotch region R3 are regions in which the absorbent article is partitioned in the longitudinal direction, and are provided adjacent to each other in the longitudinal direction. Further, the absorbent article is provided with a central region RC including the center of the absorbent body 30 in the width direction. The central region RC includes a region where the basis weight of the absorbent material constituting the absorber 30 is higher than the surroundings, a region where the absorption capacity of the body fluid of the absorber 30 is higher than the surroundings, and a second sheet that draws body fluid onto the absorber 30 It is configured by one of the arranged areas. In FIG. 1, the central region RC is indicated by hatching. The central region RC of the present embodiment is arranged in the crotch region R3. However, in the modification, the central region RC may be disposed across the front region R1 and the rear region R2 beyond the crotch region R3.

  In the present embodiment, a daytime sanitary napkin is described as an example, but the absorbent article according to the present invention can also be applied to a night sanitary napkin. The sanitary napkin for night use is configured such that the rear region R2 located on the back side of the wearer is longer than the front region R1 located on the front side of the wearer in the longitudinal direction L.

  The absorbent article 1 includes a top sheet 10 that comes into contact with the wearer's skin, a liquid-impermeable back sheet 20 that does not transmit liquid, and an absorber 30. The absorber 30 is disposed between the top sheet 10 and the back sheet 20. Therefore, the absorber 30 is shown with a broken line in FIG.1 and FIG.2.

  The absorbent article 1 has a pair of wing portions 43 and 44 extending outward in the width direction W on both sides in the width direction W of the absorbent body 30 in a plan view shown in FIG. Furthermore, the absorbent article 1 includes side sheets 41 and 42 provided outside the absorber 30 in the width direction W.

  The top sheet 10 is a liquid-permeable sheet that transmits liquid such as body fluid. The top sheet 10 covers at least the surface of the absorber 30. The top sheet 10 is not particularly limited as long as it is a sheet-like material having a structure that allows liquid to permeate, such as a nonwoven fabric, a woven fabric, a perforated plastic sheet, and a mesh sheet. Either natural fibers or chemical fibers can be used as the woven or non-woven material.

  Examples of natural fibers include cellulose such as pulverized pulp and cotton. Examples of the chemical fiber include regenerated cellulose such as rayon and fibril rayon, semi-synthetic cellulose such as acetate and triacetate, thermoplastic hydrophobic chemical fiber, and thermoplastic hydrophobic chemical fiber subjected to hydrophilic treatment.

  Examples of thermoplastic hydrophobic chemical fibers include single fibers such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET), fibers obtained by graft polymerization of PE and PP, and composite fibers such as a core-sheath structure. Can be mentioned.

  In particular, for non-woven fabrics, web forming may be performed by any of dry methods (card method, spun bond method melt blown method, air laid method, etc.), wet methods, or a combination of a plurality of them. Examples of bonding methods include thermal bonding, needle punching, chemical bonding, and the like, but are not particularly limited to these methods. Moreover, you may use the spunlace formed in the sheet form by the hydroentanglement method.

  As the perforated plastic sheet, a perforated sheet of a thermoplastic resin such as PE, PP, and PET, a porous foam material, or the like can be used. Moreover, about these, it is also preferable to make it cloudy by mixing the filler which consists of a titanium oxide, a calcium carbonate, etc. in the range of 0.5 to 10% as needed. In addition, a perforated film obtained by perforating, heat embossing, machining, or the like from a film made of a thermoplastic resin may be used. The perforated film may be used as a composite sheet with a nonwoven fabric.

The back sheet 20 has substantially the same length as that of the top sheet 10. As the back sheet 20, a polyethylene sheet, a laminated nonwoven fabric mainly composed of polypropylene, a breathable resin film, a spunbond, a sheet obtained by bonding a breathable resin film to a nonwoven fabric such as spunlace, or the like can be used. The back sheet 20 is preferably made of a material having flexibility that does not cause a sense of incongruity when worn. For example, a film obtained from a basis weight of 15 to 30 g / m ² mainly composed of a low density polyethylene (LDPE) resin. Can be used. The back sheet 20 is desirably liquid-impervious and moisture-permeable, and can be constituted by a microporous sheet obtained by stretching a melt-kneaded inorganic filler such as polyethylene or polypropylene. .

  The absorber 30 includes hydrophilic fibers and pulp. The absorber 30 is formed of a material that can absorb body fluid such as menstrual blood. Examples include pulverized pulp, cellulose such as cotton, regenerated cellulose such as rayon and fibril rayon, semi-synthetic cellulose such as acetate and triacetate, particulate polymer, fibrous polymer, thermoplastic hydrophobic chemical fiber, or hydrophilic treatment. The thermoplastic hydrophobic chemical fibers, air bonded pulp treated with chemical bonds, etc. can be used alone or in combination.

The method for forming these materials into the absorbent body is not particularly limited, but for example, a sheet formed by an airlaid method, a meltblown method, a spunlace method, a papermaking method or the like is used. Moreover, a cellulose foam, a synthetic resin continuous foam, etc. can also be used as an absorber. Furthermore, it is also possible to use what was formed into an absorbent body after pulverizing the foamed material or sheet material. Among these, the pulp is mixed in the range of 80 to 100% and the particulate polymer is mixed in the range of 20 to 0%, and the upper layer on the skin contact side of the absorber or the lower layer on the non-skin contact side of the absorber. Examples include an absorbent body having a basis weight of 100 to 700 g / m ² and a bulk of 1 to 50 mm in which an SMS nonwoven fabric sheet is arranged. In addition, you may arrange | position an SMS nonwoven fabric sheet to both an upper layer and a lower layer in an absorber.

  In addition, it is preferable that the absorber 30 which concerns on this Embodiment has not arrange | positioned the SMS nonwoven fabric sheet in the upper layer. In this case, since the SMS nonwoven fabric sheet is not disposed in the upper layer, the wet state is obtained, and peeling of the compressed groove 80 described later is unlikely to occur. Thereby, even if it uses for a long time environment, the pressing groove 80 becomes difficult to collapse, and it becomes difficult to generate | occur | produce a twist. In addition, since the SMS nonwoven fabric sheet is not disposed in the upper layer, the body fluid is transferred directly from the top sheet 10 to the pulp, so that the absorption speed is increased and body fluid leakage can be prevented.

  Moreover, as for the absorber 30, as a SMS nonwoven fabric sheet arrange | positioned at the lower layer of the absorber 30, while a long fiber sheet is arrange | positioned, it is preferable that the pressing groove 80 mentioned later is simultaneously formed also in the said long fiber sheet. In this case, since it is integrated from the upper layer of the absorber 30 to the lower layer of the absorber, the entire absorber becomes difficult to twist.

The absorbent body 30 may be formed by laminating hydrophilic fibers or powder by the airlaid method, an airlaid sheet obtained by forming hydrophilic fibers or powder into a sheet shape by the airlaid method, or a tissue (for example, It may be formed by placing pulverized pulp mixed with a superabsorbent polymer on a basis weight of 15 g / m ² ) and wrapping it with a tissue.

The absorbent body 30 according to the present embodiment is formed by laminating cotton-like pulp with a basis weight of about 200 to 500 g / m ² .

  The absorber 30 has a shape extending in the longitudinal direction, and is substantially smaller than the back sheet 20. The length of the absorbent body 30 in the width direction W corresponds to the crotch interval of an adult female and is approximately 50 to 80 mm. The absorber 30 is bonded to the back sheet 20 with an adhesive such as hot melt.

  Further, as shown in FIG. 1, the absorbent body 30 according to this embodiment is configured such that the length W1 in the width direction W of the absorbent body 30 at the center in the longitudinal direction L of the crotch region R3 is the width of the absorbent body 30 in the front region R1. It is larger than the maximum length W2A in the direction W and larger than the maximum length W2B in the width direction W of the absorber 30 in the rear region R2. In the present embodiment, the maximum length W2A in the width direction W of the absorber 30 in the front region R1 and the maximum length W2B in the width direction W of the absorber 30 in the rear region R2 are substantially the same.

  The absorber 30 has a curved portion 31 whose outer end in the width direction of the absorber 30 is convex outward in the width direction, and a linear portion 32 that extends outward in the longitudinal direction from the curved portion 31. The curved portion 31 has an arc shape, and the outer edge 31E of the curved portion 31 substantially coincides with the center in the longitudinal direction L of the crotch region R3 and the longitudinal center of the central region RC. Therefore, the length in the width direction of the absorber 30 at the center in the longitudinal direction of the central region RC is longer than the length in the width direction of the absorber 30 at the longitudinal ends of the central region RC.

  The side sheets 41 and 42 are disposed on both sides of the top sheet 10. The side sheets 41 and 42 can be selected from the same material as the top sheet 10. However, in order to prevent menstrual blood from flowing over the side sheets 41 and 42 to the outside of the absorbent article 1, it is preferable to have hydrophobicity or water repellency. The side sheets 41 and 42 cover a part of the side edge of the absorber 30 and the wing parts 43 and 44.

  In the absorbent article 1, the periphery of the surface sheet 10, the side sheets 41 and 42, and the back sheet 20 is joined, and the absorber 30 is enclosed. As a method for joining the top sheet 10 and the back sheet 20, any one or a combination of heat embossing, ultrasonic waves, or hot melt adhesive can be used.

  In the back sheet 20, an adhesive (not shown) is applied to the surface in contact with the undergarment in a plurality of regions. The pressure-sensitive adhesive is intermittently disposed along the longitudinal direction L on the back surface side of the absorber 30. The adhesive is also provided on the surface in contact with the undergarment in the wing part 43 and the wing part 44. In a state before use, the adhesive is in contact with a release sheet (not shown). The release sheet prevents the adhesive from deteriorating before use. And a peeling sheet peels by a wearer at the time of use.

  In addition, in the absorbent article which does not have a peeling sheet, you may be comprised so that it may prevent that an adhesive deteriorates before use with the packaging sheet which wraps an absorbent article separately. When the adhesive and the packaging sheet are in contact with each other, it is desirable that the surface of the packaging sheet be treated so that the adhesive can be peeled without reducing the adhesive strength of the adhesive.

  Moreover, in the back surface sheet 20, it is preferable that the adhesives are arranged in multiple rows with a predetermined width along the longitudinal direction L on the back surface side of the absorber 30.

  In this case, the predetermined width in the width direction W of the pressure-sensitive adhesive is preferably 3 mm to 5 mm, and the pitch between the pressure-sensitive adhesives is preferably 2 mm to 4 mm, which is narrower than the length in the width direction W of the pressure-sensitive adhesive. If the pitch between the pressure-sensitive adhesives is wider than the length in the width direction W of the pressure-sensitive adhesive, there is a possibility that warping will occur between them, but it will be difficult to cause warping because it is narrower than the length in the width direction W of the pressure-sensitive adhesive.

  In the absorbent article, a compressed groove 80 is formed by compressing the topsheet 10 and the absorbent body 30 in the thickness direction. The compressed groove 80 is a groove formed by processing the skin contact side of the top sheet of the absorbent article 1 and the non-skin contact side (clothing contact surface side) of the absorbent body 30. .

  The compressed grooves 80 are respectively disposed on the outer side in the width direction of the central region RC, and are disposed on the outer side in the longitudinal direction of the longitudinal compressed groove, and on the outer side in the longitudinal direction of the absorbent article. A width squeezing groove extending in the direction.

  The longitudinal squeezing groove is a squeezing groove extending at least in the longitudinal direction, may be inclined with respect to the longitudinal direction, and includes a squeezing groove having an angle with respect to the longitudinal direction of 45 degrees or less. The width pressing groove is a pressing groove extending at least in the width direction, may be inclined with respect to the width direction, and includes a pressing groove whose angle with respect to the width direction is less than 45 degrees. In FIG. 1, the boundary point BP of a longitudinal pressing groove and a width pressing groove is shown.

  The longitudinal squeezing grooves are a pair of first longitudinal squeezing grooves 81, a pair of second longitudinal squeezing grooves 82 located on the outer side in the width direction than the first longitudinal squeezing grooves 81, and a longitudinally outer side than the second longitudinal squeezing grooves 82. 3rd longitudinal pressing groove 83 located in this. The width squeezing groove has a pair of first width squeezing grooves 85 and a pair of second width squeezing grooves 86 located on the outer side in the longitudinal direction than the first width pressing grooves 85.

  The 1st longitudinal pressing groove 81, the 2nd longitudinal pressing groove 82, and the 3rd longitudinal pressing groove 83 are convex shapes which swell to the width direction outer side. A third longitudinal pressing groove 83 is connected to each of the longitudinal ends of the second longitudinal pressing groove 82.

  The first longitudinal pressing groove 81 and the first width pressing groove 85 are continuous, and an annular pressing groove is formed by the first longitudinal pressing groove 81 and the first width pressing groove 85. The first longitudinal pressing groove 81 and the first width pressing groove 85 are arranged so as to surround the center region RC. The third longitudinal pressing groove 83 and the second width pressing groove 86 are continuous, and an annular pressing groove is formed by the second longitudinal pressing groove 82, the third longitudinal pressing groove 83, and the second width pressing groove 86.

  Formed by the second longitudinal pressing groove 82, the third longitudinal pressing groove 83, and the second width pressing groove 86 outside the annular pressing groove formed by the first longitudinal pressing groove 81 and the first width pressing groove 85 in the longitudinal direction. A plurality of point-like compressed portions 87 are formed between the annular compressed grooves. A plurality of the point-like compressed parts 87 are formed at intervals.

  The rigidity of the region where the second longitudinal pressing groove 81 is formed is higher than the rigidity of the region where the first longitudinal pressing groove 81 is formed. As a specific configuration, for example, the longitudinal pressing groove has a high pressing portion having a relatively large dimension in the thickness direction and a low pressing portion having a relatively small dimension in the thickness direction, and the second longitudinal pressing groove. A configuration in which the surface density of the high pressing portion of the groove 82 is higher than the surface density of the high pressing portion of the first longitudinal pressing groove 81 can be exemplified.

  In addition, the dimension of the compressed groove in the thickness direction is the thickness of the depressed groove (thickness compressed in the thickness direction). Therefore, comparing the high-pressure squeezed part with the low-pressure squeezed part, the high-pressure squeezed part is squeezed more than the low-pressure squeezed part. Moreover, the surface density of a high pressing part is the ratio of the area which a high pressing part occupies with respect to the area of the whole pressing groove. Therefore, the ratio of the high pressing part which occupies the whole 2nd longitudinal pressing groove is higher than the ratio of the high pressing part which occupies the whole 1st longitudinal pressing groove.

  As another configuration, the rigidity of the region where the second longitudinal pressing groove 82 is formed is higher than the rigidity of the region where the first longitudinal pressing groove 81 is formed. The structure larger than the dimension of the thickness direction of the 1st longitudinal pressing groove 81, the structure where the groove width of the 2nd longitudinal pressing groove 82 is larger than the groove width of the 1st longitudinal pressing groove 81, the absorber 30 of the 2nd longitudinal pressing groove 82 The structure and the density of the absorbent body 30 of the first longitudinal pressing groove 81 are higher than the weight and density of the absorbent body 30, and the area of the high pressure portion of the second longitudinal pressing groove 82 is that of the high pressure portion of the first longitudinal pressing groove 81. A configuration larger than the area can be exemplified.

  The width direction edge part of the absorber 30 is located in the width direction outer side rather than the 2nd longitudinal pressing groove 82. FIG. Between the width direction edge part of the absorber 30 and the 2nd longitudinal pressing groove 82, the low rigidity area | region RL whose rigidity is lower than the area | region in which the 2nd longitudinal pressing groove 82 was formed is provided. In FIG. 1, the low-rigidity region RL is indicated by hatching. The low rigidity region RL is provided in the crotch region R3. At least a part of the low rigidity region RL overlaps with the central region RC in the longitudinal direction.

  On the outer side in the longitudinal direction of the low-rigidity region RL, a high-rigidity region RH having higher rigidity than the low-rigidity region RL is provided. The high-rigidity region RH is a region where a compressed groove formed by compressing the absorbent body 30 in the thickness direction is formed, or a basis weight of the absorbent material constituting the absorbent body 30 is higher than the surroundings. A high-rigidity compressed groove 88 is formed in the high-rigidity region RH of the present embodiment.

  The high-rigidity compressed groove 88 extends in the longitudinal direction. The high-rigidity compressed grooves 88 are provided on the outer sides in the width direction at the four locations on the outer ends in the longitudinal direction of the second longitudinal compressed grooves 82. In other words, the longitudinal outer end of the second longitudinal pressing groove 82 is the longitudinal inner end of the third longitudinal pressing groove 83. The boundary between the second longitudinal pressing groove 82 and the third longitudinal pressing groove 83 is recessed inward in the width direction. The high-rigidity compressed groove is disposed across the boundary between the second longitudinal compressed groove 82 and the third longitudinal compressed groove 83 in the longitudinal direction.

  The high-rigidity region RH is located on the outer side in the longitudinal direction from the extension line LE of the arc-shaped outer edge 31E of the curved portion 31 of the absorber 30. Further, the high rigidity region RH is located on the outer side in the longitudinal direction from the boundary 33 between the curved portion 31 and the straight portion 32 of the absorber 30.

  The four high-rigidity regions RH are arranged at intervals in the width direction and the longitudinal direction. The interval in the longitudinal direction of the high rigidity region RH is desirably 50 to 150 mm. When the interval in the longitudinal direction of the high-rigidity region RH is less than 50 mm, it hits the leg when worn and is likely to receive a force toward the inside in the width direction. On the other hand, if the interval in the longitudinal direction of the high-rigidity region RH is longer than 150 mm, the high-rigidity region RH is too far from the central region RC, and the effect of maintaining a flat surface around the central region RC cannot be sufficiently exhibited.

  The distance between the second longitudinal compressed groove 82 and the widthwise outer end of the absorbent body 30 is preferably 5 mm to 20 mm. When the distance between the second longitudinal pressing groove 82 and the widthwise outer end of the absorbent body 30 is less than 5 mm, the wearer feels firmness when receiving a lateral pressure from the widthwise outer end of the absorbent body. Sometimes. On the other hand, if the distance between the second longitudinal pressing groove 82 and the widthwise outer end of the absorbent body 30 is longer than 20 mm, the second longitudinal pressing groove 82 is applied when force is applied from the widthwise outer side to the widthwise inner side during mounting. This is because the height of the outer end portion in the width direction of the absorbent article that rises from the base point becomes higher than the central region, which may impair the fit of the central region.

  In addition, the high rigidity area | region RH may be an area | region where the pressing groove which squeezes the absorber 30 in the thickness direction is formed, and the fabric weight of the absorptive material which comprises the absorber 30 is higher than the circumference | surroundings. Further, the rigidity of the high-rigidity region RH may be higher than that of the low-rigidity region RL, and may be higher than the rigidity of the region where the second longitudinal pressing groove 82 is formed, It may be lower than the rigidity of the region where the two longitudinal compressed grooves 82 are formed.

  Further, for example, in the configuration in which the absorber 30 is disposed in the high stiffness region RH and the low stiffness region RL, the basis weight of the absorbent material constituting the absorber 30 in the stiffness region is the same in the low stiffness region RL. You may be comprised higher than the fabric weight of the absorptive material which comprises the absorber 30. FIG.

  The high-rigidity compressed groove 88 may be inclined with respect to the longitudinal direction and may extend in the width direction. Further, the high-rigidity squeezing groove 88 may be linear or curved, or may be constituted by a set of a plurality of point-like pressing parts.

  In addition, the fabric weight and density of the absorber 30 can be measured with the following measuring methods, for example. In the absorbent article packaged by the packaging body, the packaging body is opened, the folded absorbent article is developed, and the thickness and area of the portion where the basis weight and density are measured are measured. Subsequently, the part which measures a fabric weight and a density is cut out from an absorbent article, and the weight of the cut-out part is measured. Next, parts other than the absorber, such as the top sheet and the back sheet, are removed from the cut out part, and the weight of the absorber is measured. The basis weight is calculated based on the weight of the absorbent body and the area of the portion where the basis weight and density are measured. The density is calculated based on the basis weight and thickness.

  Moreover, the bending rigidity of an absorbent article can be measured using the Gurley method prescribed | regulated to JIS-1096, for example.

(Method for manufacturing absorbent article)
Next, a part of manufacturing method of the absorbent article 1 according to the present embodiment will be described. In addition, about the method which is not demonstrated, the existing method can be used. The manufacturing method of an absorbent article performs a sheet | seat production | generation process as a 1st step. Next, as a second step, a sheet joining process is performed. Specifically, the top sheet 10 and the side sheets 41 and 42 are bonded by, for example, heat welding.

  As a third step, an absorber molding process is performed. Specifically, the absorber 30 is formed by molding pulp as a material of the absorber with a molding drum. Note that the order of the sheet generation process in the first step and the second step and the absorbent body molding process in the third step may be reversed.

  In the fourth step, a joining process is performed. Specifically, the joining process which joins the absorber 30 shape | molded in the 3rd step, and the surface sheet and side sheet which were joined in the 2nd step is performed.

  In the fifth step, the pressing groove 80 is formed. Specifically, the top sheet 10 and the absorbent body 30 are compressed in the thickness direction to form the compressed grooves 80.

  In the sixth step, a back sheet joining step is performed. Specifically, the absorbent body 30 and the top sheet 10 in which the compressed grooves are formed, the side sheets 41 and 42, and the back sheet 20 are joined by application of a hot melt adhesive.

  Then, the process of apply | coating the adhesive agent as a slip prevention material to the non-skin contact side (clothing contact surface side) of the back surface sheet 20, a folding process, and the packaging process of the absorbent article 1 are performed. The absorbent article which concerns on this Embodiment can be manufactured according to said process.

  Moreover, after manufacturing an absorbent article, you may comprise so that an absorbent article may be folded. Specifically, for example, the absorbent article may be folded in the longitudinal direction starting from the first fold line FL1 and the second fold line FL2 along the width direction. FIG. 1 illustrates the first fold FL1 and the second fold.

(Function and effect)
In the absorbent article 1 which concerns on this embodiment, since the longitudinal pressing groove is formed in the width direction outer side rather than the center area | region RC, when the compressive force which goes to the width direction center acts from the width direction outer side, a longitudinal pressing groove Moves inward in the width direction, and the force propagates inward in the width direction through the longitudinal pressing groove.

  At this time, the low rigidity area | region RL located in the width direction outer side rather than a longitudinal pressing groove deform | transforms, and is compressed by the width direction. On the other hand, the high-rigidity region RH is located on the outer side in the longitudinal direction than the low-rigidity region RL. Therefore, it is less likely to be applied to the inner side in the width direction than the low-rigidity region RL, and is less deformable than the low-rigidity region RL. Furthermore, since the high rigidity region RH has higher rigidity than the low rigidity region RL, it is less likely to deform than the low rigidity region RL.

  Therefore, when a compressive force is applied from the outside in the width direction to the center in the width direction during mounting, the force is absorbed by the deformation of the low-rigidity region RL, and the high-rigidity region RH that is relatively difficult to deform is maintained in a flat state. Easy to do. By providing a flat area | region in the four places of the longitudinal direction outer side edge part of a longitudinal pressing groove, a pair of longitudinal pressing groove can be pressed to the width direction inner side, and it can be made to raise to a wearer side.

  Here, in FIG. 4 (a), the deformation | transformation aspect of the absorbent article which concerns on the comparative example in which the high rigidity area | region RH is not provided is shown, FIG.4 (b) is a deformation | transformation aspect of the absorbent article which concerns on this embodiment. Indicates. 4 (a) and 4 (b) are schematic views showing a state in which, when the absorbent article is attached to the underwear P, a compressive force F directed inward in the width direction is applied to the absorbent article by the force of the crotch foot. It is. 4A and 4B are cross-sectional views based on the YY line shown in FIG.

  As shown in FIG. 4A, when the rigidity of the high-rigidity region RH is not high, a compressive force is applied from the outside in the width direction when the absorbent article is attached, and the high-rigidity region RH is raised on the wearer side. To do. The central region of the absorbent body is deformed so as to be farther from the wearer than the first longitudinal compressed groove 81 and the second longitudinal compressed groove 82 which are the base points of deformation. When a compressive force toward the inner side in the width direction further acts on the absorbent article in the deformed state, the force toward the inner side in the width direction changes to a force toward the non-skin contact side. Therefore, in the center part in the width direction of the absorbent body 30, it is deformed into a convex shape downward by a downward force toward the non-skin contact side.

  On the other hand, as shown in FIG. 4B, since the high-rigidity region RH is provided, the high-rigidity region RH does not rise to the skin contact surface side. Therefore, the highly rigid area | region RH can maintain the position (position of an up-down direction) equivalent to the 1st longitudinal pressing groove 81 and the 2nd longitudinal pressing groove 82. FIG. The high-rigidity region RH is at the same position (vertical position) as the lower part of the central portion in the width direction of the absorber 30. When a compressive force toward the inner side in the width direction further acts on the absorbent article in the deformed state, an upward force can be applied to the lower portion of the absorber 30 via the high-rigidity region RH. The central part in the direction is raised on the wearer side.

  Further, when a compressive force is applied from the outer side in the width direction to the inner side in the width direction at the time of wearing, the outer region in the longitudinal direction than the central region RC is deformed, for example, the outer region in the longitudinal direction from the central region RC is the underwear side May dent. If a region on the outer side in the longitudinal direction from the central region RC is recessed toward the underwear, it is considered that the deformation of the region propagates to the central region RC, and the central region RC is also recessed toward the underwear. However, since the deformation of the region on the outer side in the longitudinal direction than the central region RC can be suppressed by the width squeezing groove, it becomes easy to maintain the state in which the central region RC is raised.

  The central region RC includes a region where the basis weight of the absorbent material constituting the absorber 30 is higher than the surroundings, a region where the absorption capacity of the body fluid of the absorber 30 is higher than the surroundings, and a second sheet that draws body fluid onto the absorber 30 It is configured by one of the arranged areas. The central region RC configured in this way is a region having higher absorption performance than the surrounding region. By lifting the central region RC toward the wearer, the body fluid discharged in the vicinity of the wearer's excretion port can be held, and discomfort due to leakage of the body fluid and diffusion of the fluid can be suppressed.

  Since the high-rigidity region RH is formed along the longitudinal direction, a certain range extending in the longitudinal direction can be maintained in a planar shape, and the deformation base point can be stabilized.

  The rigidity of the area where the second longitudinal pressing groove 82 is formed is higher than the rigidity of the area where the first longitudinal pressing groove 81 is formed. When a force applied from the outer side in the width direction to the inner side in the width direction acts on the absorbent article, the second longitudinal pressing groove 82 having a relatively high rigidity becomes a deformation base point. The second longitudinal pressing groove 82 is further away from the central region RC than the first longitudinal pressing groove 81. By providing the deformation base point away from the central region RC, it is possible to secure a wide area on the inner side in the width direction than the deformation base point. A region on the inner side in the width direction from the deformation base point is a region that protrudes toward the wearer side, and by securing the region widely, the region is raised higher on the wearer side, and the fit can be further improved.

  The high rigidity region RH is located on the outer side in the longitudinal direction from the boundary between the curved portion 31 and the straight portion 32. For example, when the entire width direction outer side end portion of the absorbent body 30 is a straight portion, the force from the width direction outer side toward the width direction inner side is easily transmitted to the entire longitudinal direction of the absorber 30. However, since the length in the width direction of the absorber 30 changes, the force that propagates at the boundary 33 between the curved portion 31 and the straight portion 32, which is the changing point, is interrupted, and the force propagates behind the boundary 33. This can be suppressed. Since the high rigidity region RH is located on the outer side in the longitudinal direction than the boundary 33 between the curved portion 31 and the linear portion 32, the high rigidity region RH is hardly affected by the force from the outer side in the width direction toward the inner side in the width direction. Therefore, the high rigidity region RH can easily maintain a flat surface.

  The high-rigidity region RH is located on the outer side in the longitudinal direction from the extension line of the outer edge of the curved portion 31. When the absorbent article is sandwiched between the legs at the time of wearing, a force from the outer side in the width direction toward the inner side is applied to the outer edge of the absorber. This force propagates along the outer edge of the absorber. Since the high-rigidity region RH is located on the outer side in the longitudinal direction from the extended line of the outer edge of the curved portion 31, even if the force directed from the outer side in the width direction to the inner side propagates along the outer edge of the absorber, the high-rigidity region RH is less affected by this force. Therefore, the high rigidity region RH can easily maintain the planar shape.

  The high rigidity region RH is formed across the first fold line FL1 and the second fold line FL2. In the absorbent article, a crease extending in the width direction is formed at a portion where a fold such as a first fold or a second fold is formed. When the crease is formed, the force applied to the inner side in the width direction when attached becomes easy to escape along the crease. Since the high rigidity region RH is formed across the first fold line FL1 and the second fold line FL2, the force applied to the inner side in the width direction at the time of mounting escapes along the crease, and the high rigidity region RH is maintained on a plane. It becomes easy.

  The back sheet at the center in the width direction of the central region RC is not provided with an adhesive portion for attaching the absorbent article to the underwear. Since the center in the width direction of the central region RC is not fixed to the undergarment, the central region RC is more likely to be lifted, and the central region RC is easy to fit the wearer.

(Other embodiments)
Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  For example, the absorbent article is not limited to a sanitary napkin, and may be an absorbent pad or a panty liner.

  An adhesive portion for attaching the absorbent article to the undergarment may be provided on the back sheet of the high rigidity region RH. The high rigidity region RH serves as a base point for lifting the central region toward the wearer. By fixing the high-rigidity region to the underwear, the high-rigidity region RH is less likely to be lifted, and the central region RC is further easily deformed in a convex shape toward the wearer.

DESCRIPTION OF SYMBOLS 1 ... Absorbent article 10 ... Top sheet 20 ... Back sheet 30 ... Absorber 31 ... Curve part 31E ... Outer edge of curve part 32 ... Linear part 33 ... Boundary 41, 42 ... Side sheet 43, 44 ... Wing part 80 ... Squeeze groove DESCRIPTION OF SYMBOLS 81 ... 1st longitudinal pressing groove 82 ... 2nd longitudinal pressing groove 83 ... 3rd longitudinal pressing groove 85 ... 1st width pressing groove 86 ... 2nd width pressing groove 87 ... Point-like pressing part 88 ... High-rigidity pressing groove R1 ... Previous Region R2 ... Rear region R3 ... Inseam region RC ... Center region RH ... High rigidity region RL ... Low rigidity region L ... Longitudinal direction W ... Width direction

Claims (10)

Having a longitudinal direction and a width direction orthogonal to the longitudinal direction;
A liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber provided between the top sheet and the back sheet,
An absorbent article in which compressed grooves are formed by compressing at least the top sheet and the absorbent body in the thickness direction of the absorbent article,
The compressed grooves are respectively disposed on the outer side in the width direction of the central region including the center in the width direction of the absorbent body and extend in the longitudinal direction of the absorbent article, and the longitudinal length of the longitudinal compressed grooves A width squeezing groove disposed on the outside in the direction and extending in the width direction of the absorbent article,
Between the longitudinal squeezing groove and the widthwise end of the absorber, a low-rigidity region having a lower rigidity than the region where the longitudinal squeezing groove is formed is provided,
On the outer side in the longitudinal direction of the low-rigidity region, a high-rigidity region having higher rigidity than the low-rigidity region is provided,
The high-rigidity region is a region where a pressing groove for pressing the absorber in the thickness direction is formed, or a region where the basis weight of the absorbent material constituting the absorber is higher than the surroundings, and the length of the longitudinal pressing groove The absorbent article provided in the width direction outer side of each of four places of a direction outer side edge part.   The central region is a region where the weight of the absorbent material constituting the absorber is higher than the surroundings, a region where the absorption capacity of the body fluid of the absorber is higher than the surroundings, and a second sheet that draws the body fluid on the absorber The absorbent article of Claim 1 comprised by either of the area | regions arrange | positioned. The absorber is arranged in the high rigidity region and the low rigidity region,
The absorptivity according to claim 1 or 2, wherein the basis weight of the absorbent material constituting the absorber in the high-rigidity region is higher than the basis weight of the absorbent material constituting the absorber in the low-rigidity region. Goods.   The absorbent article according to any one of claims 1 to 3, wherein the high-rigidity region is formed along the longitudinal direction. The longitudinal squeezing groove has a first longitudinal squeezing groove and a second longitudinal squeezing groove located on the outer side in the width direction than the first longitudinal squeezing groove,
The absorbent article according to any one of claims 1 to 4, wherein the rigidity of the region where the second longitudinal pressing groove is formed is higher than the rigidity of the region where the first longitudinal pressing groove is formed. The longitudinal pressing groove includes a high pressing portion having a relatively large size in the thickness direction and a low pressing portion having a relatively small size in the thickness direction,
The absorbent article according to claim 5, wherein the surface density of the high-pressure portion of the second longitudinal pressing groove is higher than the surface density of the high-pressure portion of the first longitudinal pressing groove. The absorbent body has a curved portion whose outer end in the width direction is convex outward in the width direction, and a straight portion extending outward in the longitudinal direction from the curved portion,
The absorbent article according to any one of claims 1 to 6, wherein the high-rigidity region is located on the outer side in the longitudinal direction with respect to a boundary between the curved portion and the straight portion. The curved portion has a circular arc shape that is convex outward in the width direction;
The absorbent article according to claim 7, wherein the high-rigidity region is located on the outer side in the longitudinal direction from the arcuate extension line of the curved portion. The absorbent article is folded in the longitudinal direction starting from a first fold and a second fold along the width direction,
The absorbent article according to any one of claims 1 to 8, wherein the high-rigidity region is formed across the first fold line and the second fold line.   The absorbent article according to any one of claims 1 to 9, wherein the back sheet at the center in the width direction of the central region is not provided with an adhesive portion for attaching the absorbent article to underwear. .

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